Gianneschi ED54 Air-Dryer Diagnostics

The Challenge

The controller displayed a PF1 temperature/dew-point probe circuit fault.

Work Performed

Operationally tested the unit and inspected refrigeration, electrical, and control components. The local authorized Gianneschi service representative subsequently confirmed a faulty control board and temperature/dew-point probe.

Result

Repair-parts and complete-replacement options were developed for owner evaluation; corrective action was deferred pending separate authorization.

Authorized diagnostic scope completed. The affected system was isolated and documented; additional corrective work was deferred pending separate authorization.